Means for stamping circular rings



H. F. VOSHARDT. MEANS FOR STAMPING CIRCULAR RINGS.

. Patented Mar. 1,1921.

2 SHEETS SHEET 1- H. F. VOSHARDT.

MEANS FOR- STAMPING ClRCU-LA R RINGS.

APPLICATION FILED SEPT-30. I916.

Patenfiad Mar. 1, 1921.

2 SHEETS-SHEET 2.

UNITED STATES PA-TENT OFFICE.

HERMAN F. VOSHARD'L'OF CHICAGO, ILLINOIS, ASSIGNOR TO FRIEDLEY-VOSHARDT CO., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MEANS FOR STAMPING- CIRCULAR RINGS.

T 0 aZZ whom it may concern:

Be it known that I, HERMAN F. Vos- HARDT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and'useful Improvement in Means for Stamping Circular Rings, of which the fol lowing is a specification.

My invention relates to that class of devices which are employed to stamp designs on metal, and has for its object to provide means whereby a design may be stamped upon a strip of metal, forming it into a circle, and to do the work of an ordinary plunger punch press.

Rings of this kind, as far as I am aware, have always been formed by means of rollers. It is well-known, however, that rolling does not produce the clear, sharp outline, which is so desirable in the high-grade stamping.

In the ordinary operation of a punch press, the female die is placed upon the bedplate of the press, and the male die is reciprocated by the plunger. If a die for stamping a ring were employed in this manner, it is obvious that the metal would be curved upwardly, so that on the second operation of the plunger, the curved portion would be engaged by it in its downward descent thus preventing the furt-her operation of the die.

My invention has for its object to provide means which can be mounted upon any punch press and which will permit the stamping of a strip of metal into a ring, even imparting an under-cut effect to the ring if desired.

My means of accomplishing the foregoing objects may be more readily understood by having reference to the accompanying drawings, which are hereunto annexed and are a part of this specification, in which:

Figure 1 is a fragmentary sectional view of a punch press equipped with my improvement.

Figs. 2, 3 and 4 are diagrammatic views of the same, showing the details of the operation.

Fig. 5 is an enlarged side elevation of my improvement.

Fig. 6 is a top or plan view of the same.

Specification of Letters Patent. Patented Mar, 1, 1921, Application filed September 30, 1916. Serial No. 123x27.

Similar reference numerals refer to similar parts throughout the'entire description.

As shown in the drawings, 7 is the press, which has a plunger 8, which is reciprocated by means rod 10.

Contrary to the usual custom, however, the female die is attached to the plunger and the male die is mounted beneath, upon my improved device which consists of a pedestal 11, secured to the bed-plate of the press, the pedestal being formed with a rectangular opening 12, through its center and be ing provided with a recessed portion 13, on

its upper surface in which to mount the die. The legs of the pedestal are relatively thin in cross section so that the ring can be easily slipped out without destroying the shape of the same.

The operation of the device is as follows:

The strip of metal 14.- is placed in position; the power is applied and the plunger brought down, which has the effect of not only stamping upon the strip of metal 14 the design contained in the die, but also formsthat part of the metal which is struck by the die into a segment of a circle and the strip is manually operated and moves the length of the die. The plunger is then raised. The strip is moved into position for the next operation of the plunger; the curved portion 15 of the stamped segment will extend into the rectangular opening in the pedestal as clearly seen in the fragmentary detail view, Fig. 3. The operation is repeated until the entire strip has been stamped when the two ends will meet, forming a circle 16, and the design will be brought out with the beauty and clearness of outline and detail which is deemed so essential in first-class stamping. It is plainly apparent to anyone skilled in the art, that it is only necessary to move one of the ends sidewise a suflicient distance to permit the leg of the pedestal to pass between the two ends and the ring may be removed without in any manner affecting the curvature of the ring.

Although I have described a concrete embodiment of means for accomplishing the desired object, it will be obvious to persons skilled in the art, that my invention is not of a crank 9, in the connecting a confined to any particular configuration or shape for the pedestal, but that any device which can be interposed between the lower die and the bed-plate'of the punch press,

which will provide apassage-way for the curved portionof the ring to enter after the first operation, will be comprehended by the spirit of my invention, and I'do notdesire V tobe limited to the structure disclosed and described, except by the limitations which may appear in the hereinafter contained claim.

It will be apparent that I have illustrated a'conventional form of punch press, but as the press forms'no part of my invention, and as my device is applicable to all I processesemploying a reciprocating plunger,'I do not wish'to be understood as conregard as new and desire to The combination witha punch press, havin a reciprocating: plunger, of a frame mounted upon the bed-plate of the press, said frame being provided with means at its top to secure and hold the male die, there being a passage through the said frame beneath the said die, for the purpose set forth,

substantially as described.

In testimony whereof I foregoing specification.

have signed the HERMAN VOSHARDT. 

